net.clackrouter.topology.core
Class TopologyModel

java.lang.Object
  net.clackrouter.topology.core.TopologyModel

public class TopologyModel
extends java.lang.Object

Represents the data of a single topology, combining information from a VNS topology file, and information provided by saved config files.

We get connectivity information from the VNS topology file, as well as host names. We get the graphical position of the components in the graph from the saved XML files.

A topology model can create a TopoGraph to represent this topo.

The topology model also implements the "VSwitch" functionality, that checks to see if a packet being transmitted by a host on a Clack network can be handed directly to another clack host running locally, or whether it must be sent back all the way to the VNS server. This improves speed for larger clack topologies, as we cut out the round-trip to VNS infrastructure (i.e., stanford) for communication between two virtual hosts.

Nested Class Summary

static class	TopologyModel.Host Represents a single host within a topology.
static class	TopologyModel.Interface Represents an interface on a host within a topology.
static class	TopologyModel.Link Represents an link between two hosts inside a topology.

Field Summary

static int

ALERTER_LENGTH_MSEC

Constructor Summary

TopologyModel(int topology, java.util.ArrayList hosts, java.util.ArrayList links, boolean isLocal, org.w3c.dom.Element topo_element)

Method Summary

boolean	attemptLocalTransmit(java.lang.String routerName, TopologyModel.Link activeLink, VNSPacket packet)
TopoGraph	createTopoGraph(TopologyView view, ClackDocument doc)
Alerter	getAlerter()
EthernetAddress	getFirewallHWAddr()
TopologyModel.Host	getHost(java.lang.String name)
java.util.ArrayList	getHosts()
TopologyModel.Link	getLink(java.lang.String router1, java.lang.String router2)
java.util.ArrayList	getLinks()
java.util.Hashtable	getLinksForHost(java.lang.String hostname)
int	getTopology()
org.w3c.dom.Element	getTopologyElement()
boolean	isLocalTopology()
void	setHostBoundsRects(java.util.Hashtable rects)
void	setLinkStatus(ClackDocument doc, java.lang.String router_name1, java.lang.String router_name2, boolean is_enabled) Used to enable or disable a link.
void	setLinkStatus(ClackDocument doc, TopologyModel.Link link, boolean is_enabled) Enable or disable the specified link, updating the GUI

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Detail

ALERTER_LENGTH_MSEC

public static final int ALERTER_LENGTH_MSEC

See Also:

Constant Field Values

Constructor Detail

TopologyModel

public TopologyModel(int topology,
                     java.util.ArrayList hosts,
                     java.util.ArrayList links,
                     boolean isLocal,
                     org.w3c.dom.Element topo_element)

Method Detail

isLocalTopology

public boolean isLocalTopology()

getTopologyElement

public org.w3c.dom.Element getTopologyElement()

getLinks

public java.util.ArrayList getLinks()

getHosts

public java.util.ArrayList getHosts()

getAlerter

public Alerter getAlerter()

setHostBoundsRects

public void setHostBoundsRects(java.util.Hashtable rects)

createTopoGraph

public TopoGraph createTopoGraph(TopologyView view,
                                 ClackDocument doc)

getLinksForHost

public java.util.Hashtable getLinksForHost(java.lang.String hostname)

attemptLocalTransmit

public boolean attemptLocalTransmit(java.lang.String routerName,
                                    TopologyModel.Link activeLink,
                                    VNSPacket packet)

getTopology

public int getTopology()

getHost

public TopologyModel.Host getHost(java.lang.String name)

getFirewallHWAddr

public EthernetAddress getFirewallHWAddr()

getLink

public TopologyModel.Link getLink(java.lang.String router1,
                                  java.lang.String router2)

setLinkStatus

public void setLinkStatus(ClackDocument doc,
                          java.lang.String router_name1,
                          java.lang.String router_name2,
                          boolean is_enabled)

Used to enable or disable a link. Just a wrapper around the main setLinkStatus function.

Parameters:

doc -

router_name1 -

router_name2 -

is_enabled -

setLinkStatus

public void setLinkStatus(ClackDocument doc,
                          TopologyModel.Link link,
                          boolean is_enabled)

Enable or disable the specified link, updating the GUI

Parameters:

doc -

link -

is_enabled -